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Vulnerability · Published Sep 17, 2026 · Assigned by Linux

CVE-2026-92518riscv, bpf: Fix kernel stack corruption in tailcall with CFI

High 7.8

In plain English

A high-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.2%top 93.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: riscv, bpf: Fix kernel stack corruption in tailcall with CFI When CONFIG_CFI_CLANG is enabled, prog->bpf_func already skips the kcfi instruction during setup. Including it again in the tailcall jump offset causes it to jump over an extra 4 bytes, skipping the stack pointer adjustment, which will result in kernel stack corruption.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13linuxno fix listedDEBIAN-CVE-2026-92518
Debian:14linux7.2.6-1DEBIAN-CVE-2026-92518
Ubuntu:26.04:LTSlinux7.0.0-42.42UBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-92518
Ubuntu:26.04:LTSlinux-aws7.0.0-1016.17UBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-92518
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-92518
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-92518
Ubuntu:26.04:LTSlinux-gcp7.0.0-1016.18UBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-92518
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-hwe-7.07.0.0-42.42~24.04.1UBUNTU-CVE-2026-92518
Ubuntu:26.04:LTSlinux-ibm7.0.0-1017.17UBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-92518
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-92518
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-92518
Ubuntu:26.04:LTSlinux-oem-7.07.0.0-1017.17UBUNTU-CVE-2026-92518
Ubuntu:26.04:LTSlinux-oracle7.0.0-1015.16UBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-92518
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-92518
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-92518
Ubuntu:26.04:LTSlinux-riscv7.0.0-42.42.1UBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-92518
Ubuntu:24.04:LTSlinux-riscv-7.07.0.0-42.42.1~24.04.1UBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-92518
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-92518

Affected products (as reported)

VendorProductVersions
Linux Linux 30a59cc79754fd9ff3f41b7ee2eb21da85988548 – before 34b1bb33a025787e05f966e74de18cd36276f80130a59cc79754fd9ff3f41b7ee2eb21da85988548 – before a6e11a81da3420fd37f1518d4f238c4d5784086e30a59cc79754fd9ff3f41b7ee2eb21da85988548 – before 52fb1756ea1d2759dfef2d86245be00b05dac3a2fe5b68fdcec0f3d97a32f4c4acfef59cf90718f76.11.6 – before 6.12
Linux Linux 6.12

References